1. The use of external devices, most often electronic in nature, to help a person gain conscious control over mental and bodily functions that are usually thought of as automatic and not controllable by the conscious mind, such as the pulse rate and brainwave pattern.
2. The use of instrumentation to measure the effects of various mental processes including imagery and suggestion on such biological functions as brainwave patterns, finger temperature, and galvanic skin response.
Readers, please enjoy this guest blog post by Sandra Kynes, author of several books, including The Herb Gardener's Essential Guide, Plant Magic, and the new Witches' Encyclopedia of Magical Plants, among many others.
Although a few old books...